Cayenne Weather in May

May in Cayenne brings high temperatures, with daytime highs of 30°C (86°F) and nights around 24°C (75°F). It's also the wettest month of the year, so an umbrella is a must.

Rainfall in Cayenne in May

Cayenne is in the rainy season in May, with rain on around 26 days and an average of 403 mm (16 in). With high rainfall totals spread across the month, individual showers can be very heavy. Waterproof gear is strongly recommended.

Temperature in Cayenne in May

May in Cayenne sees highs of 30°C (86°F) and lows of 24°C (75°F) overnight. Overall, the month follows a fairly predictable daily temperature pattern. At 24°C (75°F) overnight, it stays warm after dark. Light, breathable clothing and good airflow in your room make a noticeable difference.

Sunshine in Cayenne in May

The city usually sees around 122 hours of sunlight, indicating a moderately sunny period (despite it being part of rainy season).

Wind Speed in Cayenne in May

Wind speeds average 3 m/s (6 knots) during May. At this speed, light breezes keep leaves and small twigs in gentle motion while the wind also provides natural cooling. Since this is an average, some days are more tranquil while others have more persistent light winds that are more noticeable.

Average water temperature in May

At 28°C (82°F), the water is warm and comfortable for swimming. Most people find this temperature ideal for spending longer periods in the water.

If you prefer dry days with pleasant temperatures, May may not be the ideal month to visit Cayenne. Our weather planner can help you explore destinations with more pleasant weather conditions.

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Check the conditions for any month of the year.

• January
• February
• March
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• May
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• August

• September
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• December

For a detailed overview over the year and the best time to visit French Guiana, check out our Cayenne's climate page.

Cayenne Temperature in May

Min Temperature 24°C (75°F)  

Max Temperature 30°C (86°F)  

Water Temperature 28°C (82°F)  

Chance of Rain 86%  

Precipitation 403 mm (16 in)  

Rainy days 26 days  

Humidity 85%  

Windspeed 3 m/s (6 knots)  

Sunshine 122 hours  

Percentage Sunshine  

Daily Historical Temperatures

48-year average (1976-2025)

Based on our historical records, temperatures in Cayenne typically stay consistent throughout May, with daily highs averaging around 30°C (86°F). Nights are warm, with lows around 24°C (75°F).

Average temperatures in May

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Daily Historical Precipitation

48-year average (1976-2025)

Average daily rainfall for each day of the month based on long-term records.

Average precipitation in May

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Historical weather for Cayenne in May

Browse day-by-day weather records for Cayenne spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.

Historical weather Temperatures Precipitation

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‹ January February March April May June July August September October November December ›

Cayenne historical weather extremes in May

According to our 34 years of weather records for Cayenne, the following extremes were recorded between 1992 and 2026.

• Cayenne recorded its highest May temperature of 33°C (91°F) on May 15, 2024.
• The coldest May day was on May 6, 2003, with a maximum of 24°C (75°F).
• The lowest overnight temperature recorded in May was 15°C (59°F) (May 26, 2019).
• Peak precipitation in May occurred on May 20, 2013, when 122 mm (4.8 in) of precipitation was measured.

What to Wear in Cayenne in May

Warm temperatures in May make for comfortable sightseeing weather. Pack breathable fabrics like cotton shirts, knee-length shorts or skirts, and comfortable walking shoes. A thin long sleeve for indoor spaces is handy. Heavy rain is guaranteed, please bring a good poncho and waterproof everything! With water temperatures around 28°C (82°F), swimming conditions are excellent. Pack your swimsuit, goggles, and maybe some water shoes. Bring sunglasses since you'll have some sunny periods throughout the month

What To Do in Cayenne in May

We rated the following activities from 1 (least suitable) to 10 (best) to do.

Swimming

7/10

Cycling

7/10

Walking

7/10

Camping

6/10

Outdoor sports

7/10

Select a Month

Check the conditions for any month of the year.

• January
• February
• March
• April

• May
• June
• July
• August

• September
• October
• November
• December

For a detailed overview over the year and the best time to visit French Guiana, check out our Cayenne's climate page.

More climate data for Cayenne

Temperature Rainfall Sunshine Humidity Wind Speed Water Temp

See the full Cayenne climate overview or explore weather in French Guiana.